norcross



2 Sheets-Sheet 1.

(N6 Model.)

Y J. W. NORGROSS.

TAGKLB BLOCK.

Patented Jan. 3, 1882.

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(No Model.)

V J. W. NORCROSS'.

TAGKLB BLOCK.

Patented Jan. 3, 18 82.

(www we UNITED STATES PATENT OFFICE.

-JOSEPH W. NOEoROss, OELOGKPOET, NEW YORK.

TAoKLE-BLOCK.

SPECIFICATION forming part of Letters Patent No. 251,926, dated January 3, 1882. Y Application filed November 15,1881. (No model.)

To all 'whom it may concern Be it known that I, JOSEPH W.NoR`oRoss,

- lowing is a specification.

" against the inner surface of the outer strap or This invention consists inthe combination, with the inner metallic straps and with the outer metallic frames or straps, of tubular prostraps through openingsin the ends of the in ner straps, an H -shaped distance-piece, and keys which extend through the tubular projections and through the H -shaped distance-piece, so that a firm and durable connection is obtained, while,when the keys are driven out, the frames and stra-ps can readily betaken apart 5 also, in a lubricating-cup cast on or otherwise iirmly connected with the inner strap, bearing frame, said outer strap or frame being provided with a hole for the introduction of the lubricating material 5 further, in a sheave composed of a metallic rim, wooden disks fitting the interior of said rim, two metallic straps extend: ingdiametrically across the wooden disks at right angles toward each other, rivets projectingfrom the metallicrimand extendingthrough the straps near their outerI ends, `a hub projecting from one strap through the wooden disks and through the second strap, a shoulder. formed on said hub to form a beating for the second strap, and pins cast solid with said hub and serving as rivets for securing the two straps rrnly together.

This invention is illustrated in the accompanying drawings, in which Figure l represents a face`view of my pulley-block. Fig. 2 is a transverse vertical section ot' the same. Fig. 2* is asimilarsection ofatwo-sheave block. Fig. 2** is a sectional plan of the connectingpiece for a two-sheave block. Fig. 3 is a perspectiveview of the breech end of one of the outer metallic frames. Fig. 4t is a horizontal section of the block in the plane x x, Fig. 2. Fig. 5 is a. perspective view ot' the breech end of the inner metallic straps. Fig. Gis a perspective view of the H-shaped distance-piece. Fig. 7 is a perspective view of one of the keys. Fig. 8 is a face viewlof the sheave. Fig. 9 is Eig. 4.

a sectional side view of the two metallic straps used in the construction of my sheave. Fig. l() is a. diagram showing the connection of my pnlleyiblock to the tiller ot' a vessel. Fig. 1l

is a vertical section of the bracket and swivelarm which I use in making this connection. Fig. 12 is` a front view ot the same. Fig. 13 is f a plan or top view of a moditied form of said bracket.V Fig. 14 is a vertical section of the same.

jections extending from the outer frames or Similar letters indicate corresponding parts.

In thesedrawings, the letter A designates my pulley-block; and B is the sheave, which has its bearing on the center-pin or axle C.

The block A is composed of outer metallic frames or straps, D D, inner metallic straps, E E, and wooden cheeks F F, which are placed between the outer frames and the inner straps. At the .breechot' the block the outer straps or frames, D, are provided with tubular projec- `tions a. a. and with noses I) b, Figs. 3 and 4.

These noses hug the edges of the inner straps, and thel projections a a extend` through apertures c c, Figs. 2, 4. and 5,' in the :inner straps, and in order to produce a rmconnection I use an H shaped distance-piece, Gr, :and keys H. A perspective view ot' said distance-piece is shown in Fig. 6 and.v a sectional plan 'view in It consists ot' two tubular bars, d d, and transverse connecting-bars e.

By referring to Fig. 4 it will be seen that the projections a a of the outer straps or frames extend between the tubular` bars d d, so that the keys H can be made to pass through said tubular bars and through the projections a et, and if the keys are inserted a drm connection is eiected and at the same time the parts can be readily separated by removing the keys.

lt will be readily seen from this description that the outside frames or straps can be keyed together with the inner straps without using the distance-piece G, but I use the distancepiece in order to strengthen the connection. It is obvious that the same connection may be applied to the head end of the block.

Each of the inner straps, E E, is provided with a lubricatingbox,f, Fig. 2, 'hich is cast solid with or otherwise tirmly attached to the same. These lubricating-boxes extendthrough the wooden cheeks F, and their outer edges bear tight against the inner surfaces of the IOO outer straps or frames so as to prevent the cscape of the lubricating material. In these outer straps or frames are holes which are closed by plugs g, and through which the boxes f can be charged with the lubricating material. rIhe axle or center-pin C extends through the inner straps into the lubricating-boxes f, so that the bearing-surfaces can be easily lubricated by keeping up a supply of a suitable lubricant in the boxes f. For two-sheave or multiple blocks I use a connecting-piece, O, such as shownin Figs. 2* and 2*'*2 It consists of a head, r, which lits between the inner straps, E* Et, and from which extend tubular projections s s, through apertures in said straps. These tubular projections connect with H- shaped distance-pieces Git, in the manner already described.

The sheave B consists of a metallic rim, h, the inner periphery of which is slightly tapering outward, (see Fig. 2,) while its outer, periphery is provided with a groove, i', for the reception of the rope. vInto the interior of the rim h are placed two wooden disks,j, and onthe outer surface of each of these disks is placed a metallic strap, k, which extends diametrically across, and is provided with holes ll, to engage with pins m m, Fig. 2, which project fromrthe rim h, and which form rivets for connecting the straps rmly to said rim. One of these straps is provided with a hubnt, Figs. 2 and 9, which extends through the Wooden disks j, and is provided with pins o o, Fig.9, so that these pins form rivets, by means of which the two straps can be rmly connected. By lthese means the rim h, the disksj, and the straps 7c can he firmly unitedwithout requiring much time or labor.

For the purpose ot' connecting my pulleyblock to the tller I, Fig. l0, or to any other part in avessel, I use a bracket, lr, Figs. 11 and 14, a. pin, L, which has its hearing in said bracket, a tube, M ,which ts this pin and swivels on the same, and an arm,N,-which extends from said tube,'and is provided with a hole, q, to receive the pin r', Fig. 2, at the front ends of the pulley-blocks. .If the bracket K is to be secured tothe tillerit is made in theform shown in Figs. 11 and 12; butif said bracket is to be secured to the deck ot the vessel, Fig. l0. it is made in the form shown in Figs. 13 and 14. By providing the said tube M with the arm N the connection with the pulley-block can be made very easily, and when thus connected the block can accommodate itself to the motions 0f the rope, and the danger of chating the rope is avoided. This construction ot bracket,how

ever, for connecting the pulley-block with the tiller I do not here'claim, as such will form the subject-matter of a separate application i'or Letters Patent.

What I claim as new, and desire to secure by Letters Patent, is-

1. The. combination, substantially as hereinbefore described, of the inner metallic straps, the outer metallic frames or straps, the tubular projections extending from the outer frames or straps through openings in the ends of the inner straps,and the keys which extend through the tubular projections.

l2. rIhe combination, substantially as hereinbefore described, of the inner metallic straps, the outer metallic frames or straps, the tubular projections extending from the outer metallic frames or straps through openings in the ends of the innerstraps, the H -shaped distancepiece, and the keys which extend through the tubular projections and through the H shaped distance-piece.

3. The combination, with the inner and outer straps, ot' the lubricatingcup castor otherwise attached to the inner surface ofthe inner strap, andcovered at its open end by the xed outer strap, the latter having a perforation communicatingy with the cup, which is closed by a removable plug, all substantially as and for the purpose described.

4. The cupf, connected with the. inner surface ofthe inner strap,E,and projecting through the wooden cheek-piece F,in combination with the fixed outer strap,D, forming a cover to the cup and confining the wooden cheek-piece in place,substantially as and for the purpose described.

5. The combination, substantially as hereinbefore described, ot' the metallic rim h, the wooden disks fitting the interior ot' said rim, the pins m m, projecting from the rim, the straps lc, extending diametrically across the disks and provided with holes to engage with the pins m m, the hub n, extending from the first strap through the wooden disks and provided with a shoulder which bears the second.. strap, the pins o 0, projecting from the hub, and the holes in the second strap to engage with said pins.

In testimony whereotl have hereunto setmy hand and seal in the. presenceof two subscribing witnesses.

JOSEPH NV. NORCROSS.

Witnesses:

W. HAUFF, E. F. K-AsTnNnUBER.

IOO 

